Bug fixes:
If the serial port encounters a problem during operation, it's now caught.
Warnings for default values being applied to metadata files are now more descriptive and output via stderr.
Fixed bug displaying bitfield values.
Fixed improper name for SerialException from serial library.
Display of bitfields no 0-pads the number to the full bitsize and are therefore more readable.
The message rate is now truncated to 1 decimal place.
Fixed conversion compilation bug and refactored a print() function.
Merge pull request #11 from Susurrus/master

Bunch o' fixes